How to get ROWID in SQLite?
SELECT rowid, * FROM tbl1 WHERE letter=”B”
rowid
Using text as a primary key in SQLite table bad?
Is it bad to have text as a primary key in an SQLite database? I heard that it’s bad for performance reasons, is this true? From correctness point of view, TEXT PRIMARY KEY is all right. From performance point of view, prefer INTEGER keys. But as with any performance issue, measure it yourself to see … Read more
ROWID (oracle) – any use for it?
ROWID is the physical location of a row. Consequently it is the fastest way of locating a row, faster even than a primary key lookup. So it can be useful in certain types of transaction where we select some rows, store their ROWIDs and then later on use the ROWIDs in where clauses for DML … Read more
Equivalent of Oracle’s RowID in SQL Server
From the Oracle docs ROWID Pseudocolumn For each row in the database, the ROWID pseudocolumn returns the address of the row. Oracle Database rowid values contain information necessary to locate a row: The data object number of the object The data block in the datafile in which the row resides The position of the row … Read more